Printing mechanism for printing telegraph receivers



Oct. 27, 1925.

G. 5. HILTZ PRINTING MECHANISM FOR PRINTING TELEGRAPH RECEIVERS 2 Sheets-Sheet 1 Filed March 28, 1923 INVENTOR @0 1 s. BY

' ATTORNE vs Oct. 27,1925. 1,558,610

G. S. HILTZ FRIN'IING IBCHANISII FOR PRIN'iING TELEGRAPH REQEIVIRS Filed March 28, 1923 {snags-shoot .2

1N VEINTOR A TTORNE Y8 Patented Oct. 27, 1925.

UNITED STATES PATENT OFFICE.

GEORGE S. HILTZ, OF BROOKLYN, NEW YORK, ASSIGNOR TO STOCK QUOTATION TELE- GRAPH COMPANY, OF NEW YORK, N. Y., A CORPORATION OF NEW YORK.

PRINTING MECHANISM FOR PRINTING TELEGRAPH RECEIVERS.

Application filed March 28, 1923. Serial No. 628,193.

To all whom it may concern:

Be it known that I, GEORGE S. HIL'rz, a citizen of the United States of America, residing at Brooklyn, Kings County, New York, have invented certain new and useful Improvements in Printing Mechanism for Printing Telegraph Receivers, of which the following is a full, clear, and exact description.

- This invention relates to printing telegraph receivers, more particularly to the printing mechanism thereof, and is in the nature of an improvement on the printing devices described in my prior Patent No. 1,085,124, issued January 27, 19141, for printing from a pair of coaxial type disks or a type wheel having two circumferential rows of type in such manner that imprints may be made from either disk or row at will without at the same time making an imprint from the other. The present invention is designed to simplify the construction and provide a mechanism which requires a minimum amount of power for its operation. To these and other ends the mvention consists in the novel features hereinafter described.

One form of the invention is illustrated in the accompanying drawings, in which Fig. 1 is a front view of a receiver equipped with my improvement;

Fig. 2 is a vertical section about on line 22 of Fig. 1, looking in the direction of the arrows but omitting the typewheel set ting escapement and magnets;

Fig. 3 is a detail side view of the platen arm, from the same point of View as Fig. 2;

Fig. 4 is a detail plan view of the platen and tape-guide, corresponding to a sectional plan view on line 44 of Fig. 3 but omitting the type disks;

Fig. 5 is a detail section on line 5-5 of Fig. 4, showing the platen in position to print from the left hand type disk;

Fig. 6 is a view similar to Fig. 5 but showing the platen shifted to the position for printing from the right hand type disk.

The machine illustrated is of the class known as stock tickers and is designed to print on a paper tape, shown at 10, from type on a pair of disks 11, 12, fixed on a transverse shaft 13 which is rotated by or under the control of an electromagnetic escapement 14 to bring any desired pair of axially aligned type (on the disks) to the printing line. The type may be inked in any convenient manner, not shown, as for example by the means described in my prior Patent No; 1,085,124, above mentioned. The tape 10 is carried up into contact with one type disk or the other, to makethe imprint, by means of a platen 15 mounted on a printing arm 16 which is fixed at its rear end on a transverse shaft 17 at the back of the machine. This shaft is rocked by the armature 18, fixed on the shaft and actuated at the will of the distant sending operator by the printing magnet 19, as explained in my prior patent referred to and in my copending application Serial No..617,860.

As shown in Figs. 2, 5 and 6, the tape 10 passes between the type disks 11, 12, and a curved guide or shield 20, supported on the frame of the machine by an arm 21. The tape is fed forward one letter-space after each printing operation by a toothed wheel 22, Fig. 2, cooperating with a cramp roller or disk 23 carried on a spring actuated arm 24 to press the tape yieldingly on the toothed feed-wheel. The latter is rotatedone step on the clockwise or down stroke of the printing arm 16 by a pawl 24 cooperating with a ratchet 25 fixed on the feed-wheel shaft 26. Reverse rotation of the ratchet and feed-wheel on the up stroke of the printing arm, or by the backward drag of tape, is prevented by a light spring holding pawl 27.

The printing platen 15 works through a transverse slot 28 in the tape shield 20 and in the present embodiment is in the form of a flat plate having a pair of printing arms 29, 30. The platen is pivoted at 31 on a supporting arm 32 fixed on the printing arm 16, and the upper flat edges of the printing arms 29, 30 are disposed at an angle to each other, as shown, so that by rocking the platen on its pivot either arm may be swung up into printing position. Thus in Fig. 5, arm 29 is up, and hence when the printing lever or arm 16 is actuated by the printing magnet 19 the tape will be struck up against the left hand type disk. In Fig. 6 the arm 30'is in printing position, to print from the right hand type disk.

To swing or adjust the platen on its pivot for the purpose just described, it is provided with an adjusting arm 32, having a cam slot 33, engaged by the rearwardly III extending lower end of a shifting finger 34 depending from the front end of a rock shaft 85 mounted in bearings 36 on the printing lever .16. The cam slot is so shaped, that counterclockwise movement of the finger from the position shown in Fig. 5 will rock 'theplaten to the position of Fig. 6, as will be readily understood. Conversely, clockwise movement of the finger in Fig. 6 will shift the platen to the position shown in 5.

The platen shifting finger 3 2 is itself actuated in either direction at will by a lever 3 7,'Figs. 5 and 6, fixed on the rockshaft 35, Fig.3,having its two arms in position to be engaged by the actuating fingers38, S9, onthe typewheel shaft 13. These fingers are spaced'angularly 180 apart.

"When the platenis in the position illustrated in Fig. 5, imprints will be made from the'type disk 11. If, then, the distant operator desires-to print from a type on disk 12, he first rotates the typewheel shaft far enough to bring the finger 38 to the downward-or operative position and then energizesthe printing magnet 19, thereby swinging the printing lever 16 up, as previously explained. The first effect of this movement is to bring the left'hand arm of the lever 3? (Fig. 5) up against the finger 38, thereby rocking the lever counterclockwise, and, by the agency of the linger 84 and camarm 32, swinging the platen counterclockwise tothe position shown in Fig. 6. The arm of the platen is now uppermost, and hence as the platen continues its upward movement thetape will be carried into contact with disk 12. It, When the platen is in this position (Fi 6), the operator desires to print from disl 11,he rotates the typewh'eel shaft until finger 39 thereon is in operative position and then energizes the printing magnet, which causes the right hand arm of lever 37 to engage finger 39, thereby swinging the platen clockwise, to the position shown in Fig. 5. The spaces on the type disks corresponding to theoperative positions of the shifting fingers 38, 39, may be left blank, so that no imprint will be made during the stroke by which the platen is rocked, but to economize space on the disks I prefer to provide these spaces with a frequently used punctuation mark, asfor example a period.

On the rear end of the shaft is a V shaped cam 40, Figs. 5 and 6, to cooperate with the V-shapedend of a light spring 41 mounted on the printing lever 16. When the shaft is rocked in either direction far enough to carry the point of the cam past the point of the spring the latter instantly, by its own energy, carries the cam on and completes the movement, as will be readily understood. This insures quick and complete setting ofthe platen with a limited platen to the other position.

upward movement of thelever 37 and also holds the latter and the shifting finger 34 against accidental displacement.

its will. be seen in Figs; and 6, the pressure exerted by the platen on the type disk in making an imprint tends to rock the Such result is prevented, however, by the terminal portions of the cam slot 83, which are so shaped that the pressure of the arm 32 on the finger 34 (the rearward portion thereof) will .be exerted longitudinally of the finger in which case the platen cannot rock in either direction. Or'the slot terminals can'beinclined in such manner that the printing pressure will tend to urge the finger 3 l against the adjacent end of the slot and so lock the parts. Thus in Fig. 6 it will be seen that clockwise movement of the platen by downward pressure on platen arm 30 will,

through the agency of the slot 32, tend to earn the finger 34 rightwardly and'bring its rearwardly bent portion against the right end of the slot, after which no further move ment of the platen can be produced by the printing pressure. Similarly in Fig. 5, counterclockwise movement of the arm 32 can only shift the finger 3st into contact with the left end of the slot.

It is to be understood that the invention is not limited to the specific construction here'inillustrated and described but can be embodied in other forms without departure from its spirit.

I claim- 1. In a printing telegraph receiver, in combination, a pair of type disks rotatable to bring selected characters thereon to a printing position, a printing lever, a platen pivotally mounted on the printing lever to swing in a plane transverse thereto and having a pairof printing-arms one for each type disk, and means associated with the'platen and the type disks and operable at will to rock the platen in said transverse plane and thereby present the' platen printing-arms singly to their respective type disks.

2. In a printing telegraph receiver, in combination, a typedisk shaft, a pair of rotatable type disks actuated by the shaft to bring selected characters to a printing position, a printing lever, a platen pivotally mounted .on' the printing lever to swing in a plane'transverse thereto and having a pair of printing arms to cooperatewith'the type disks, shifting finger carried by the print ing lever to rock the platen in said transverse plane and thereby present the printing-arms singly to the respective type disks, and means carried by the type disk shaft and adjustable at will thereby, to. actuate the shifting finger when the printing lever is actuated.

3. In a printing telegraph receiver, in combination, a pa1r .of type disks, a printing lever, a platen pivotally mounted on the printing lever to swing in a plane transverse thereto, having a pair of printing arms to cooperate with the type disks and having a cam arm, a shifting finger carried by the printing lever and cooperating with said cam arm to rock the platen in said transverse plane and thereby present the printing arms singly to the respective type disks, and means adjustable at will and in harmony with the type disks to actuate the shifting finger.

4c. In a printing telegraph receiver, in combination, a pair of rotatable type disks, a printing lever, a platen pivotally mounted on the printing lever, having a. pair of printing arms to cooperate with the type disks and having an arm provided with a cam slot, a shifting finger pivoted on the printing lever and engaging the cam slot to rock the platen and present the printing arms singly to the respective type disks, and means adjustable at will in harmony with the type disks to actuate the shifting finger.

5. In a printing telegraph receiver, in combination, a pair of rotatable type disks, a printing lever, a platen pivotally mounted on the printing lever, having forked printing arms provided with angularly disposed printing surfaces to cooperate with the type disks, and having an arm provided with a cam slot, and means operable at will, including a shifting finger engaging the cam slot, to rock the platen and thereby present the printing arms singly to the respective type disks.

6. In a printing telegraph receiver, in

combination, a pair of rotatable type disks,

a printing lever, a platen pivotally mounted on the printing lever, having a pair of printing arms to cooperate with the type disks and provided with angularly disposed printing surfaces, and having an arm provided with a cam slot, a shifting finger engaging the cam slot and movable to rock the platen and thereby present the printing arms singly to the type disks, a rock shaft mounted on the printing lever and connected at its forward end with the shifting finger to actuate the latter, means adjustable at will in harmony with the type disks to rock said shaft when the printing lever is actuated, and means at the rear of the rock shaft to insure complete movement of the shaft when movement thereof has been initiated by the adjustable means.

7, In a printing telegraph receiver, in combination, a pair of rotatable type disks, a printing lever, a platen pivotally mounted on the printing lever, having a pair of printing arms to cooperate with the type disks, a shield between the type disks and the platen and having a transverse slot to permit either of the platen printing arms to strike the respective type disk when the printing lever is actuated, and means operable at will in harmony with the type disks to rock the platen and thereby present the printing arms singly to the respective type disks.

In testimony whereof I hereto affix my signature.

GEORGE S. HILTZ. 

